Ground Under Repair
Ground under repair (GUR) is an area on a golf course defined by the Committee as unfit for play, allowing a golfer free relief under Rule 16.1 when the ball, stance, or swing is interfered with.
What is ground under repair?
Ground under repair, often abbreviated to GUR, is one of the four abnormal course conditions defined in the Rules of Golf. The other three are animal holes, immovable obstructions, and temporary water. These conditions sit outside the normal challenge of the game, and a player whose ball, stance, or swing is interfered with by any of them is generally entitled to free relief under Rule 16.1.
The Committee in charge of the course or competition decides what counts as GUR. Once an area is defined, the entire ground inside its edge becomes ground under repair, along with any grass, bush, or tree rooted inside it. A branch that extends above the boundary is part of the GUR, but a root from a tree rooted outside the area is not.
The purpose is straightforward. Course damage and active maintenance work are not part of the test the player signed up for, so the rules give a way to play around them without losing a stroke.
How ground under repair is marked
There is no single colour that the Rules require for ground under repair markers. According to the R&A’s Committee Procedures, white or blue stakes and lines are the most common in practice. Red and yellow are deliberately avoided to prevent confusion with penalty areas.
How the boundary is drawn depends on the type of marker:
| Marker type | Where the boundary sits |
|---|---|
| Stakes | The line between the outside points of the stakes at ground level. The stakes themselves are inside the GUR. |
| Painted lines | The outside edge of the line. The line itself is in the GUR. |
| Physical features (e.g. flower bed, fence) | Defined in the local rules. |
The Committee can also declare any part of the course as GUR with or without a visible marker. Some categories of damage and maintenance qualify as ground under repair automatically, even when the area is not staked or painted. The next section covers those cases.
What counts as ground under repair (and what doesn’t)
The official definition of GUR covers more than the obvious staked-off patch of turf. The USGA and R&A list several categories that qualify as ground under repair even when no committee has marked them.
Automatically counts as GUR:
- Holes made by maintenance staff during course setup or repair work, such as the gap left after a tree stump was removed or a pipe was laid.
- Grass cuttings, leaves, or other material piled up for later removal.
- An animal habitat, such as a bird’s nest, close enough to the ball that a stroke or stance might damage it.
Does not automatically count as GUR:
- Aeration holes, which the rules treat as normal course conditions. A course can adopt Model Local Rule E-4 to allow relief from them on the putting green, but it is not automatic.
- Tractor ruts. A committee can declare a deep rut as GUR, but it does not qualify by default.
- Old hole plugs that have settled below the surface of the green.
- Fallen trees or stumps still in place. They only count once they have been unearthed or cut up for removal.
- Worm casts and insect holes, since these animals are loose impediments.
When in doubt, the course’s local rules are the place to check.
How to take relief from ground under repair
A player whose ball, stance, or swing is interfered with by GUR has two options under Rule 16.1: play the ball as it lies, or take free relief.
When relief is taken, the player identifies the nearest point of complete relief. This is the closest spot to the original ball where the GUR no longer interferes with the lie, stance, or intended swing, and which is no nearer the hole. The ball is then dropped within a one club-length relief area measured from that point.
The relief area generally has to be in the same part of the course as the original ball: general area to general area, bunker to bunker, green to green or the general area. A player who chooses to take relief outside a bunker may do so for a one-stroke penalty. On the putting green, line-of-play relief is also allowed if the GUR sits between the ball and the hole.
A second drop is not permitted simply because the first produced a poor lie. The Rule 16.1 clarification confirms that conditions after the drop are part of the player’s luck for that hole, good or bad.
Ground under repair vs other abnormal course conditions
Most golfers come across GUR alongside a few related rule terms. All four conditions sit under the umbrella of abnormal course conditions in Rule 16.1, and free relief is allowed from any of them.
| Condition | What it is |
|---|---|
| Ground under repair | Area defined by the Committee as unfit for play, plus the categories listed in the rule book. |
| Animal holes | Holes dug by burrowing animals, except for worms or insects. |
| Immovable obstructions | Artificial objects that cannot reasonably be moved, such as cart paths, sprinkler heads, or buildings. |
| Temporary water | Standing water on the course not in a penalty area, such as a puddle from rain or irrigation. |
Temporary water is the condition most often confused with GUR, partly because it used to be called casual water. The two are distinct: temporary water concerns standing water that interferes, while GUR concerns damaged or maintained ground. A flooded bunker can fall under either definition depending on whether the Committee has declared the bunker as GUR.
When relief is mandatory
Free relief from GUR is almost always optional. A golfer who likes the lie can play the ball where it sits, even if the area is staked or roped off. The two situations where relief becomes mandatory are written into the rules.
The first is a No Play Zone. Rule 16.1f states that a player whose ball is in a no play zone within an abnormal course condition must take relief, and the same applies if the ball is outside the no-play zone but the player’s stance or swing area would touch it. No play zones are typically used to protect newly seeded grass, environmentally sensitive areas, or staked young trees.
The second situation is when the Committee has set up a mandatory drop zone for a specific area of GUR. The local rules will state when this applies and which drop zone to use.
Playing from the wrong place when relief was mandatory carries the general penalty: two strokes in stroke play, or loss of hole in match play, under Rule 14.7a.
Related Golf Terms
- Drop zone — A designated area where a player may drop the ball under certain rules.
- Gross score — The total number of strokes taken without any handicap adjustment.
- Grip it and rip it — A phrase meaning to swing aggressively without overthinking.
- Grip — The rubber or cord covering on the handle of a golf club.
- Grip pressure — How tightly a golfer holds the club, which affects control and distance.
Frequently Asked Questions
Do you have to take relief from ground under repair?
No. A player can choose to play the ball as it lies unless the GUR area is also marked as a No Play Zone, in which case relief becomes mandatory under Rule 16.1f.
Are tractor ruts considered ground under repair?
Not by default. A committee can declare a deep rut as GUR, but ruts are not automatically covered. Check the local rules before assuming free relief.
Are aeration holes ground under repair?
No. The rules specifically exclude aeration holes from the GUR definition. Courses can adopt Model Local Rule E-4 to allow relief from aeration holes on the putting green.
What colour stakes mark ground under repair?
The Rules of Golf do not require a specific colour. White or blue stakes and lines are the most common, while red and yellow are avoided to prevent confusion with penalty areas.
What happens if a ball is lost inside ground under repair?
Rule 16.1e applies. If it is known or virtually certain that the ball came to rest in the GUR, free relief is allowed using the estimated entry point as the reference point, with no need to find the ball.
Sources
- USGA & R&A. “Rule 16: Relief from Abnormal Course Conditions.” The Rules of Golf. Accessed May 2026.
- USGA & R&A. “Definition: Ground Under Repair.” The Rules of Golf. Accessed May 2026.
- R&A. “Committee Procedures Section 2: Course Marking for General Play.” Accessed May 2026.
- Carroll, Steve. “What is ground under repair?” National Club Golfer, 28 January 2025. Accessed May 2026.
- Florida State Golf Association. “Abnormal Course Conditions.” Accessed May 2026.
- Hennessey, Stephen. “Rules of Golf Review: Ground under repair, dos and don’ts.” Golf Digest, February 2025. Accessed May 2026.
- Bisset, Fergus. “Can You Play A Ball From GUR?” Golf Monthly, April 2024. Accessed May 2026.
